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  2. Prostate-specific antigen - Wikipedia

    en.wikipedia.org/wiki/Prostate-specific_antigen

    Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.

  3. Prostate cancer screening - Wikipedia

    en.wikipedia.org/wiki/Prostate_cancer_screening

    The 4Kscore combines total, free and intact PSA together with human kallikrein 2. [46] It is used to try to determine the risk of a Gleason score greater than 6. [46] The Prostate Health Index (PHI) is a PSA-based blood test for early prostate cancer screening. It may be used to determine when a biopsy is needed.

  4. Purchase and sale agreement - Wikipedia

    en.wikipedia.org/wiki/Purchase_and_Sale_Agreement

    A purchase and sale agreement (PSA), also called a sales and purchase agreement (SPA) [1] or an agreement for purchase and sale (APS), [2] is an agreement between a buyer and a seller of real estate property, company stock, or other assets.

  5. Public service announcement - Wikipedia

    en.wikipedia.org/wiki/Public_service_announcement

    A public service announcement (PSA) is a message in the public interest disseminated by the media without charge to raise public awareness and change behavior. Oftentimes these messages feature unsettling imagery, ideas or behaviors that are designed to startle or even scare the viewer into understanding the consequences of undergoing a particular harmful action or inaction (such as pictures ...

  6. Prostatic acid phosphatase - Wikipedia

    en.wikipedia.org/wiki/Prostatic_acid_phosphatase

    PAP immunohistochemical staining is often used with PSA (staining), by pathologists, to help distinguish poorly differentiated carcinomas.For example, poorly differentiated prostate adenocarcinoma (prostate cancer) and urothelial carcinoma (bladder cancer) may appear similar under the microscope, but PAP and PSA staining can help differentiate them; [7] prostate adenocarcinoma often stains ...

  7. PSA: Kids Can Get Into These NYC Museums for Free - AOL

    www.aol.com/psa-kids-nyc-museums-free-164100546.html

    Museum of the Moving Image. Kids under three get free admission at the Museum of the Moving Image—and all other visitors can score free general admission every Thursday between 2 and 6 p.m ...

  8. Production sharing agreement - Wikipedia

    en.wikipedia.org/wiki/Production_sharing_agreement

    Production sharing agreements (PSAs) or production sharing contracts (PSCs) are a common type of contract signed between a government and a resource extraction company (or group of companies) concerning how much of the resource (usually oil) extracted from the country each will receive.

  9. Gleason grading system - Wikipedia

    en.wikipedia.org/wiki/Gleason_grading_system

    Similar to Gleason 1, the glands are usually larger than those of Gleason 3 patterns, and are round to oval in shape. Thus the main difference between Gleason 1 and 2 is the density of packing of the glands seen; invasion is possible in Gleason 2, but by definition not in Gleason 1. [4] [7]

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